Spare Battery Box for Metal Detecting

As a followup to my coin probe holster ( https://www.thingiverse.com/thing:2846254 ), I wanted to make a spare battery case. Both my Garrett AT Max and my Garrett Carrot use 9v batteries, so I designed this box to hold two 9-volt batteries. But, since I know a lot of detectors use 4 AA batteries instead, I expanded the space a bit. So, you can either store two 9 volts or 4 AAs in the box (or one 9 Volt and 2 AAs, but that's just weird).

You could also throw some cotton in the box and use it for nice coins. It's your plastic, and you'll do what you want to, do what you want to...

The box is designed to attach to your belt or web gear via 2 zip ties. I have been testing this method out with the coin probe holster, and it works really well. I would recommend printing the top and case at 100% infill and .2 layer height, no supports. The top is a friction fit. I have found that .2 makes more sense for friction fitting than .1 or .3, with .1 being too smooth and .3 being too rough. Make your porridge accordingly.